An enquiry is technical data, and treating it as a message costs you days
Duty point, fluid, materials, standard
A flow equipment enquiry is fully described by a small number of parameters: what the fluid is, how much of it has to move against what head, at what temperature and pressure class, in what material, to which standard, with what end connection. Received as an email and forwarded to proposals, those parameters get extracted by hand, sometimes twice, and the questions that come back to the client are questions the client already answered. Captured as fields on the enquiry, the technical review starts on arrival and the offer is built from data rather than from prose.
Your own history becomes searchable by duty, not by memory
The most useful thing a manufacturer owns is what it has already quoted and built. When that history lives in a folder structure named after clients, the only way to find a comparable job is to ask the engineer who has been there longest. When enquiries carry their duty and materials as data, a similar job is a search: same service, similar head and flow, same metallurgy. Pricing gets more consistent and estimation gets faster, and neither depends on one person still working there.

